擅长:python、mysql、java
<p>这里有一个例子。也许会更好,但这应该对你有用。你知道吗</p>
<pre><code>import pandas as pd
df = pd.DataFrame({"Country":["France", "UK", "France", "UK"],
"Population":[1, 2, 3, 4],
"Suicide case":[5, 3, 6, 2]})
df_grouped = df.groupby("Country").sum()
(df_grouped["Suicide case"]/df_grouped["Population"])*100
</code></pre>